I started a diet on 14 August, doing Calorie calculations, so my diet is based on calories.
My Weight on 14 August was 159.1 Kg , i went to websites and to this site to check how much calories i must eat every day, the calculation say that for my weight and my height 189 cm, the needed daily calories is about 3000 calories, that is also what FitDay site tell me, i decided to eat daily Max 1500 calories which is half of the needed.
In first 4 days i went down to 156.4 kg and now after 8 days i am still 156.4, so in last 4 days it stooped, maybe that is normal i don't know but i will continue.
My goal is to go down to 120 kg.
So in first 8 days i lost 2.70 kg.

I know it sounds crazy but loose weight you have to eat. If you exercise you will burn more calories than your bmr calculation. This is a rough estimate of how many calories you burn in 24 hours not the be all. Everyone is different on how many calories they burn. I eat every 3 to 4 hours at the minimum to keep sugar level so when I do eat I don't eat to fullness but rather satisfaction there is a huge difference in eating what you need and what you think you need. The key is to figure out what you need in calories. So If you track your foods everyday and you have a base say of 13,500 calories a week which is 3500 a day and you don't lose or gain any weight than that is the amount of calories you burn everyday. However if you gain say one pound then you are overeating 3500 calories in a week or 500 a day. Depending on what the scale looks like at the end of the week will help you determine your individual caloric needs. So If you lose half a pound then you know that you burn about 3250 on average a day. If you want to lose more you need per pound a 3500 calorie deficit per week to lose on average one pound per week. If you cut to many calories your body will go into starvation mode and you won't lose anything irregardless of you caloric intake. Its a balance you have to find between your caloric needs to lose weight and your caloric needs to not. Once again to drastic a change will only put your body in starvation mode and no matter how many calories you cut you won't lose anything except valuable muscle which helps you burn more than fat.

I don't know, but 1500 seems very low. I would ask a health care professional before going on any diet. THere may be medical reasons to be careful. FitDay is here for information, support and logging tools and does not replace the advice of a health care provider. Are you drinking water? A health care provider also will advise you on how much water to drink per day.
Good luck. We are here for you. See a health care provider and stick with it!

Yep, your under eating and your body stores fat while burning up muscle instead.....not good. Get a base intake, I think 3000 is off but get a starting point. Track your weight. If you gain then drop 200cal or so, and continue doing so until you find what works.

Im only 5'7" and my maintenance is at 2400cal so that gives you a idea of how low 1500cal is. But, I do lift weights.